JVC AV-56P776 Service Manual page 17

3.2 MEMORY IC REPLACEMENT
• This model uses the memory IC.
• This memory IC stores data for proper operation of the video and drive circuits.
• When replacing, be sure to use an IC containing this (initial value) data.
3.2.1 MEMORY IC LIST
Simbol Number of pins
IC1803 8-pin
3.2.2 MEMORY IC REPLACEMENT PROCEDURE
1. POWER OFF
Switch off the power and disconnect the power plug.
2. REPLACE THE MEMORY IC
Be sure to use the memory IC written with the initial setting
values.
3. POWER ON
Connect the power plug to the AC outlet and switch on the
power.
4. RECEIVING CHANNEL SETTING
Refer to the OPERATING INSTRUCTIONS and set the
receive channels (Channels Preset) as described.
5. USER SETTING
Check the user setting items according to the given in page
later. Where these do not agree, refer to the OPERATING
INSTRUCTIONS and set the items as described.
6. SERVICE MODE SETTING
Verify what to set in the SERVICE MODE, and set whatever is
necessary. Refer to the INITIAL SETTING VALUE OF
SERVICE MENU.
1-16 (No.YA318)
Mounting PWB
MAIN PWB
Main content of data
Initial setting data is memorized.
3.2.3 SERVICE ADJUSTMENT ITEM
SERVICE MODE MAIN MENU
1.PICTURE/SOUND
2.YC SEP
3.WHITE BALANCE
4.MEMORY SETUP
5.RF AFC
6.CONVER A
Setting items
1.PICTURE/SOUND (Video / Audio setting)
Audio circuits (A)
Video circuits (S)
Deflection circuits (D)
Factory setting items (F)
2.YC SEP (3D YC separation setting) [Do not adjust]
3.WHITE BALANCE (White balance adjustment)
4.MEMORY SETUP (Memory data edit) [Do not adjust]
5.RF AFC (AFC setting) [Do not adjust]
6.CONVER A (Convergence adjustment)
7.CONVER B (Convergence adjustment)
8.IP (DIST processing setting) [Do not adjust]
9.DSD (Digital super detail setting) [Do not adjust]
0.HDMI (Digital input processing setting) [Do not adjust]
7.CONVER B
8.IP
9.DSD
0.HDMI
Settings Item No.
Adjust A01 to A27
Adjust S01 to S99
Adjust D01 to D32
Fixed F01 to F86
Fixed YCM001 to YCM131
BR
DRV R
DRV B
Adjust
CUT R
CUT G
CUT B
Fixed ---
Adjust CPA01 to CPA11
Adjust CCA01 to CCA12
Adjust CBA01 to CBA94
Adjust ---
Fixed IPA001 to IPA042
Fixed DSA001 to DSA053
Fixed DSB001 to DSB053
Fixed DSC001 to DSC044
Fixed DSD001 to DSD017
Fixed HDM001 to HDM080
Fixed RHD001 to RHD170